I have a conventional hot water and central heating system, installed in 1987 when the house was built.
The radiators appear hotter than the thermostat would suggest. There is no response to turning the thermostat down. The thermostat, mounted in the hall, clicks on and off when rotated, as normal.
Several years ago, with much appreciated help from this forum, I replaced the motorised valve head only. I'm now thinking that the valve is sticking and it's to replace the body with a complete new unit.
I've read that the system needs to be drained. Does this generally mean the central heating system only or does it also mean the hot water tank?
Many thanks in advance for your help.
The radiators appear hotter than the thermostat would suggest. There is no response to turning the thermostat down. The thermostat, mounted in the hall, clicks on and off when rotated, as normal.
Several years ago, with much appreciated help from this forum, I replaced the motorised valve head only. I'm now thinking that the valve is sticking and it's to replace the body with a complete new unit.
I've read that the system needs to be drained. Does this generally mean the central heating system only or does it also mean the hot water tank?
Many thanks in advance for your help.